The evidence from the nose by Nikolai Gogol that leads you to believe that Kovaloff has not learned anything from his experience is that He refuses to marry a woman who doesn't have enough money.
Explanation:
"The nose" by Nikolai Gogol tells the story of a runaway nose and the continuous pursuit of his owner, Kovaloff feels his life has over without his nose, he would not be able to show himself in front of anybody, then when he thinks that is a curse that a Lady made because of his refusal to marry her daughter he promises to marry her if they remove the curse, but then when he gets his nose back he refuses to marry the girl again.
Wind, water, tide and muscle - both animal and human - provided sources of energy that are still available to man and are still used to power simple machines in many parts of the world today.
